# GitLab Integration GitLab can authenticate against passbook using SAML. ## Preparation The following placeholders will be used: - `gitlab.company` is the FQDN of the GitLab Install - `passbook.company` is the FQDN of the passbook Install Create an application in passbook and note the slug, as this will be used later. Create a SAML Provider with the following Parameters: - `ACS URL`: https://gitlab.company/users/auth/saml/callback - `Audience`: https://gitlab.company - `Issuer`: https://gitlab.company You can of course use a custom Signing Certificate, and adjust the Assertion Length. To get the value for `idp_cert_fingerprint`, you can use a tool like [this](https://www.samltool.com/fingerprint.php). ## GitLab Configuration Paste the following block in your `gitlab.rb` file, after replacing the placeholder values from above. The file is located in `/etc/gitlab`. ```ruby gitlab_rails['omniauth_enabled'] = true gitlab_rails['omniauth_allow_single_sign_on'] = ['saml'] gitlab_rails['omniauth_sync_email_from_provider'] = 'saml' gitlab_rails['omniauth_sync_profile_from_provider'] = ['saml'] gitlab_rails['omniauth_sync_profile_attributes'] = ['email'] gitlab_rails['omniauth_auto_sign_in_with_provider'] = 'saml' gitlab_rails['omniauth_block_auto_created_users'] = false gitlab_rails['omniauth_auto_link_saml_user'] = true gitlab_rails['omniauth_providers'] = [ { name: 'saml', args: { assertion_consumer_service_url: 'https://gitlab.company/users/auth/saml/callback', idp_cert_fingerprint: '4E:1E:CD:67:4A:67:5A:E9:6A:D0:3C:E6:DD:7A:F2:44:2E:76:00:6A', idp_sso_target_url: 'https://passbook.company/application/saml//login/', issuer: 'https://gitlab.company', name_identifier_format: 'urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress', attribute_statements: { email: ['urn:oid:1.3.6.1.4.1.5923.1.1.1.6'], first_name: ['urn:oid:2.5.4.3'], nickname: ['urn:oid:2.16.840.1.113730.3.1.241'] } }, label: 'passbook' } ] ``` Afterwards, either run `gitlab-ctl reconfigure` if you're running GitLab Omnibus, or restart the container if you're using the container.